diff --git a/EnvelopeGenerator.Domain/Entities/Receiver.cs b/EnvelopeGenerator.Domain/Entities/Receiver.cs
index 6f48d058..195240f9 100644
--- a/EnvelopeGenerator.Domain/Entities/Receiver.cs
+++ b/EnvelopeGenerator.Domain/Entities/Receiver.cs
@@ -33,7 +33,7 @@ namespace EnvelopeGenerator.Domain.Entities
         public string TotpSecretkey { get; set; }
 
         [Column("TFA_REG_DEADLINE", TypeName = "datetime")]
-        public DateTime TfaRegDeadline { get; set; }
+        public DateTime? TfaRegDeadline { get; set; }
 
         public List<EnvelopeReceiver> EnvelopeReceivers { get; set; }